Alerting Users to Events

1. A set of headphones comprising: a pair of cups, each housing a speaker to be positioned over an ear of a user; a microphone; a processor; an actuator to move a member of at least one of the cups to uncover at least a portion of the ear of the user to expose the user to ambient sound; a user control to activate a training mode of the headphones in which the processor operates the microphone to record relevant sounds occurring when the training mode is activated; the processor to subsequently analyze ambient sounds external to the headphones that are received by the microphone and compare those ambient sounds to the recorded relevant sounds; and the processor to selectively activate the actuator to uncover at least a portion of the ear of the user to expose the user to ambient sound in response to determining that the ambient sounds match the relevant sounds.

2. The headphones of claim 1 , the processor to selectively activate the actuator based on a priority level assigned to a type of activity in which the user is engaged with the headphones, such that the actuator operates to expose the user to ambient sound in response to determining that the ambient sounds match the relevant sounds only if the priority level of the type of activity is below a threshold.

3. The headphones of claim 1 , wherein the member is pivotally connected to the cup via a hinge such that, when the processor selectively activates the actuator, the member pivots to at least partially expose the user to the ambient sounds.

4. The headphones of claim 1 , wherein the member is rotatably connected to the cup such that, when the processor selectively activates the actuator, the member rotates relative to the cup to open an aperture through the cup such that the ear of the user is exposed to the ambient sounds.

5. The headphones of claim 2 , wherein, when the headphones are connected to an external device, the processor to receive an indication from the external device as to a type of audio signal being output by the external device to the headphones, the type of the audio signal determining the priority level.

6. The headphones of claim 1 , wherein the processor is to upload a recording of the relevant sounds to a database after the training mode of the headphones is completed for use by a subsequent user.

7. A set of headphones comprising: a pair of cups, each housing a speaker to be positioned over an ear of a user; a microphone; a processor; an actuator to move a member of at least one of the cups to uncover at least a portion of an ear of the user to expose the user to ambient sound; the processor to analyze ambient sounds external to the headphones that are received by the microphone and compare those ambient sounds to relevant sounds; and the processor to selectively activate the actuator to, based on a priority level assigned to a type of activity in which the user is engaged with the headphones, uncover at least a portion of the ear of the user to expose the user to ambient sound in response to determining that the ambient sounds match the relevant sounds.

8. The headphones of claim 7 , further comprising a user control to activate a training mode of the headphones in which the processor operates the microphone to record sounds occurring when the training mode is activated as the relevant sounds.

9. The headphones of claim 7 , wherein, when the headphones are connected to an external device, the processor to receive an indication from the external device as to a type of audio signal being output by the external device to the headphones, the type of the audio signal determining the priority level.

10. The headphones of claim 7 , further comprising a touch sensor located on the headphones, the touch sensor to send a command to the processor when activated by a user touching the touch sensor to instruct the actuator to toggle the member between open and closed positions.

11. The headphones of claim 7 , wherein the member is pivotally connected to the cup via a hinge such that, when the processor selectively activates the actuator, the member pivots to at least partially expose the user to the ambient sounds.

12. The headphones of claim 7 , wherein the actuator selectively opens a member of both cups to selectively expose the user to ambient sound.

13. A method comprising: activating, via a user control, a training mode of headphones in which a processor operates a microphone of the headphones to record relevant sounds occurring when the training mode is activated; analyzing, via the processor, ambient sounds external to the headphones that are received by the microphone and comparing those ambient sounds to the recorded relevant sounds; and selectively activating, via the processor, an actuator to move a member of at least one cup of the headphones to uncover at least a portion of an ear of a user to expose the user to ambient sound in response to determining that the ambient sounds match the relevant sounds.

14. The method of claim 13 , further comprising activating, via the processor, the actuator to, based on a priority level assigned to a type of activity the user is engaged in with the headphones, uncover at least a portion of the ear of the user to expose the user to the ambient sound in response to determining that the ambient sounds match the relevant sounds.

15. The method of claim 14 , wherein the priority level assigned to the type of activity the user is engaged in with the headphones is determined by: receiving an indication from an external device as to the type of activity the user is engaged in with the headphones, the indication comprising information associated with the external device and media being played on the external device; and matching the indication to priority levels stored in memory to determine the priority level for that type of activity.

16. The headphones of claim 1 , wherein memory of the processor stores preloaded data indicating additional relevant sounds in addition to those recorded in the training mode.

17. The headphones of claim 1 , wherein memory of the processor stores voice data for a specific person, the processor to recognize a voice of the specific person as among the relevant sounds to which the user wants the headphones to respond.

18. The headphones of claim 7 , further comprising a user input device to receive user input designated a priority level of content being heard through the headphones.

19. The method of claim 13 , further comprising recording a person speaking a keyword or key phrase during the training mode, the keyword or key phrase being a relevant sound to which the user wants the headphones to respond.

20. The method of claim 13 , further comprising recording voice data for a specific person during the training mode, wherein the voice of that specific person is among the relevant sounds to which the user wants the headphones to respond.